diff --git a/.prettierrc b/.prettierrc
index 6b858bb..98f86c2 100644
--- a/.prettierrc
+++ b/.prettierrc
@@ -3,5 +3,5 @@
   "tabWidth": 2,
   "singleQuote": true,
   "printWidth": 100,
-  "trailingComma": "none"
+  "trailingComma": "none",
 }
diff --git a/src/components/DriverView/DriverTrainCard.vue b/src/components/DriverView/DriverTrainCard.vue
index b2ff25a..8699859 100644
--- a/src/components/DriverView/DriverTrainCard.vue
+++ b/src/components/DriverView/DriverTrainCard.vue
@@ -1,73 +1,323 @@
 <template>
-    <div class="driver-train-card">
-        <TrainInfo :train="chosenTrain" :extended="true" />
+  <div class="driver-train-card">
+    <TrainInfo :train="chosenTrain" :extended="true" />
 
-        <!-- Train action buttons -->
-        <div class="train-stock-actions">
-            <button class="btn btn--action" style="margin: 1em 0" @click="copyStockToClipboard()">
-                <i class="fa-regular fa-copy"></i> {{ i18n.t('trains.stock-copy') }}
-            </button>
+    <!-- Train action buttons -->
+    <div class="train-stock-actions">
+      <button class="btn btn--action" style="margin: 1em 0" @click="copyStockToClipboard()">
+        <i class="fa-regular fa-copy"></i> {{ i18n.t('trains.stock-copy') }}
+      </button>
 
-            <button class="btn btn--action" style="margin: 1em 0" @click="showNumberPropositions()">
-                <i class="fa-regular fa-lightbulb"></i> {{ i18n.t('trains.number-propositions') }}
-            </button>
+      <button class="btn btn--action" style="margin: 1em 0" @click="toggleNumberPropositions()">
+        <i class="fa-regular fa-lightbulb"></i> {{ i18n.t('trains.number-propositions') }}
+      </button>
+    </div>
+
+    <!-- Proposed numbers container -->
+    <transition name="view-anim" class="propositions-container">
+      <div v-if="arePropositionsVisible">
+        <h3 style="margin-bottom: 0.5em">{{ i18n.t('trains.number-propositions-header') }}</h3>
+
+        <div class="categories-select">
+          <button
+            v-for="(category, i) in availableCategories"
+            class="btn btn--option btn--action"
+            @click="selectCategory(i)"
+            :class="{ checked: i == chosenCategoryIndex }"
+          >
+            {{ category }}
+          </button>
         </div>
 
-        <StockList :trainStockList="chosenTrain.stockList" />
-        <TrainSchedule :train="chosenTrain" />
-    </div>
+        <div v-if="numberPropositions.length > 0" class="propositions-numbers">
+          <div v-if="chosenCategory">
+            <b>{{ chosenCategory }} </b> -
+            {{ i18n.t(`categories.${chosenCategory.slice(0, 2)}`) }}
+            ({{ i18n.t(`categories.${chosenCategory.slice(2)}`) }})
+          </div>
+
+          <div v-if="chosenCategoryRules">
+            <span v-if="chosenCategoryRules[0]"
+              >{{ i18n.t('trains.number-propositions-third-number') }}
+              <b class="text--primary">{{ chosenCategoryRules[0] }}</b> &bull;
+            </span>
+
+            <span
+              >{{
+                i18n.t('trains.number-propositions-last-nums', {
+                  count: chosenCategoryRules[1].length
+                })
+              }}
+              <b class="text--primary">{{ chosenCategoryRules[1] }}</b> -
+              <b class="text--primary">{{ chosenCategoryRules[2] }}</b></span
+            >
+          </div>
+
+          <div style="margin-top: 0.5em">
+            <b>Propozycje:</b> <i>{{ numberPropositions.join(', ') }}</i>
+          </div>
+        </div>
+
+        <div class="no-propositions" v-else>{{ i18n.t('trains.number-propositions-empty') }}</div>
+      </div>
+    </transition>
+
+    <StockList :trainStockList="chosenTrain.stockList" />
+    <TrainSchedule :train="chosenTrain" />
+  </div>
 </template>
 
 <script setup lang="ts">
-import { PropType } from 'vue';
+import { PropType, ref } from 'vue';
 import { Train } from '../../typings/common';
 import { useI18n } from 'vue-i18n';
+import { useApiStore } from '../../store/apiStore';
 
 import StockList from '../Global/StockList.vue';
 import TrainSchedule from '../TrainsView/TrainSchedule.vue';
 import TrainInfo from '../TrainsView/TrainInfo.vue';
 
+import rulesJSON from '../../data/trainNumberRules.json';
+import { computed } from 'vue';
+import { watch } from 'vue';
+
+const apiStore = useApiStore();
+
 const i18n = useI18n();
 
+const arePropositionsVisible = ref(false);
+const chosenCategoryIndex = ref(0);
+
+const numberPropositions = ref<string[]>([]);
+const chosenCategoryRules = ref<any[]>([]);
+
 const props = defineProps({
-    chosenTrain: {
-        type: Object as PropType<Train>,
-        required: true
-    }
+  chosenTrain: {
+    type: Object as PropType<Train>,
+    required: true
+  }
 });
 
 function copyStockToClipboard() {
-    const stockString = props.chosenTrain.stockList.join(';');
+  const stockString = props.chosenTrain.stockList.join(';');
 
-    if (!stockString) {
-        alert(i18n.t('trains.stock-clipboard-failure'));
-        return;
+  if (!stockString) {
+    alert(i18n.t('trains.stock-clipboard-failure'));
+    return;
+  }
+
+  navigator.clipboard
+    .writeText(stockString)
+    .then(() => {
+      prompt(i18n.t('trains.stock-clipboard-success'), stockString);
+    })
+    .catch(() => {
+      alert(i18n.t('trains.stock-clipboard-failure'));
+    });
+}
+
+function toggleNumberPropositions() {
+  arePropositionsVisible.value = !arePropositionsVisible.value;
+
+  if (arePropositionsVisible.value) generateNumberPropositions();
+}
+
+function selectCategory(i: number) {
+  chosenCategoryIndex.value = i;
+
+  generateNumberPropositions();
+}
+
+function generateNumberPropositions() {
+  const categoryCode = chosenCategory.value?.slice(0, 2);
+  const trainNoStr = props.chosenTrain.trainNo.toString();
+
+  // Get category rules
+  const rules = categoryCode
+    ? ((rulesJSON.categoriesRules as any)[categoryCode] as any[])
+    : undefined;
+
+  if (!categoryCode || !rules) {
+    numberPropositions.value.length = 0;
+    chosenCategoryRules.value.length = 0;
+
+    return;
+  }
+
+  const [thirdNumber, minRange, maxRange] = rules;
+
+  const propositionsArr: string[] = [];
+
+  for (let i = 0; i < 5; i++) {
+    let generatedNumStr = '';
+
+    generatedNumStr += trainNoStr.at(0) ?? Math.floor(Math.random() * 10);
+    generatedNumStr += trainNoStr.at(1) ?? Math.floor(Math.random() * 10);
+
+    // Third number
+    generatedNumStr += thirdNumber ?? '';
+
+    // Remaining numbers
+    const rangeNums = minRange?.length ?? 3;
+
+    const randRange = Math.floor(
+      Math.random() * (Number(maxRange) - Number(minRange)) + Number(minRange)
+    ).toString();
+
+    const leadingZeros = new Array(Math.abs(randRange.toString().length - rangeNums))
+      .fill('0')
+      .join('');
+
+    generatedNumStr += `${leadingZeros}${randRange}`;
+
+    const isNumberTaken =
+      apiStore.activeData?.trains?.some((t) => t.trainNo.toString() == generatedNumStr) ?? false;
+
+    if (!isNumberTaken) {
+      propositionsArr.push(generatedNumStr);
+    } else {
+      i--;
     }
 
-    navigator.clipboard
-        .writeText(stockString)
-        .then(() => {
-            prompt(i18n.t('trains.stock-clipboard-success'), stockString);
-        })
-        .catch(() => {
-            alert(i18n.t('trains.stock-clipboard-failure'));
-        });
+    if (Number(randRange) > Number(maxRange)) break;
+  }
+
+  numberPropositions.value = propositionsArr;
+  chosenCategoryRules.value = rules;
 }
 
-function showNumberPropositions() {
+const chosenCategory = computed(() => {
+  return availableCategories.value.at(chosenCategoryIndex.value);
+});
 
-}
+const availableCategories = computed(() => {
+  const stockList = props.chosenTrain.stockList;
+  const headVehicle = stockList.at(0)?.split('-')[0] ?? '';
+
+  let availableCategories: string[] = [];
+  let categoryTraction = 'E';
+
+  let vehicleTypesSet = new Set<string>();
+  let wagonsNamesSet = new Set<string>();
+  let cargoNamesSet = new Set<string>();
+
+  for (const stockName of stockList) {
+    const [vehicleName, ...cargoList] = stockName.split(':');
+
+    const vehicleData = apiStore.vehiclesData?.find((v) => v.name == vehicleName);
+
+    if (!vehicleData) continue;
+
+    vehicleTypesSet.add(vehicleData.type);
+
+    if (vehicleData.type.startsWith('wagon-')) wagonsNamesSet.add(vehicleData.name.split('_')[0]);
+
+    if (cargoList !== undefined) cargoList.forEach((c) => cargoNamesSet.add(c.split('_')[0]));
+  }
+
+  let vehicleTypesArr = [...vehicleTypesSet];
+  let wagonsNamesArr = [...wagonsNamesSet];
+
+  // Traction
+  if (vehicleTypesArr[0] == 'loco-electric') categoryTraction = 'E';
+  else if (vehicleTypesArr[0] == 'loco-diesel') categoryTraction = 'S';
+  else if (vehicleTypesArr[0] == 'unit-electric') categoryTraction = 'J';
+  else categoryTraction = 'M';
+
+  // EMU / DMU - M*, R*, P*
+  if (vehicleTypesArr.length == 1 && (categoryTraction == 'J' || categoryTraction == 'M')) {
+    availableCategories.push('MO', 'MP', 'MM', 'RO', 'RP', 'RA', 'RM', 'PW');
+  }
+  // Only locos (up to 3) - LT, LP, LS
+  else if (stockList.length <= 3 && vehicleTypesArr.every((v) => v.startsWith('loco-'))) {
+    if (/^(EU|ET|201E|4E|SU|ST|M62|CTLR4C)/.test(headVehicle)) availableCategories.push('LT');
+    if (/^(EU|EP|SU|SP)/.test(headVehicle)) availableCategories.push('LP');
+    if (/^(SM)/.test(headVehicle)) availableCategories.push('LS');
+  }
+  // Only locos (more than 3) - TH
+  else if (stockList.length > 3 && vehicleTypesArr.every((v) => v.startsWith('loco-'))) {
+    availableCategories.push('TH');
+  }
+  // Loco(s) + passenger only wagons - M*, R*, E*, P*
+  else if (vehicleTypesArr.every((v) => v.startsWith('loco-') || v == 'wagon-passenger')) {
+    availableCategories.push('EI', 'EC', 'EN', 'MO', 'MP', 'MM', 'RO', 'RP', 'RA', 'RM', 'PW');
+  }
+  // Loco(s) + cargo only / mixed wagons - T*, Z*
+  else {
+    if (wagonsNamesArr.every((v) => /^(627Z|412Z)/.test(v)))
+      availableCategories.push('TC', 'TD', 'TS');
+    else if (wagonsNamesArr.length < 3 || cargoNamesSet.size < 3)
+      availableCategories.push('TM', 'TG', 'TS');
+    else availableCategories.push('TN', 'TK', 'TR', 'TS', 'ZU', 'ZN');
+  }
+
+  return availableCategories.map((c) => `${c}${categoryTraction}`);
+});
+
+watch(
+  computed(() => `${props.chosenTrain.trainNo}`),
+  () => {
+    chosenCategoryIndex.value = 0;
+    generateNumberPropositions();
+  }
+);
 </script>
 
 <style lang="scss" scoped>
+@use '../../styles/responsive';
+
 .driver-train-card {
-    padding: 1em;
-    background-color: var(--clr-view-bg);
-    border-radius: 0 0 0.5em 0.5em;
+  padding: 1em;
+  background-color: var(--clr-view-bg);
+  border-radius: 0 0 0.5em 0.5em;
 }
 
 .train-stock-actions {
-    display: flex;
-    gap: 0.5em;
+  display: flex;
+  gap: 0.5em;
 }
-</style>
\ No newline at end of file
+
+.propositions-container {
+  margin-bottom: 1em;
+  padding: 0.5em;
+  background-color: #111;
+}
+
+.categories-select {
+  display: inline-flex;
+  flex-wrap: wrap;
+  gap: 0.5em;
+
+  position: relative;
+
+  &::after {
+    content: '';
+    position: absolute;
+    bottom: calc(-0.5em);
+    left: 0;
+
+    width: 100%;
+    height: 2px;
+    background-color: #aaa;
+  }
+}
+
+.propositions-numbers {
+  margin-top: 1em;
+}
+
+.no-propositions {
+  margin-top: 1em;
+  color: #ccc;
+}
+
+@include responsive.smallScreen {
+  .propositions-container {
+    text-align: center;
+  }
+
+  .categories-select {
+    justify-content: center;
+  }
+}
+</style>
diff --git a/src/data/trainNumberRules.json b/src/data/trainNumberRules.json
new file mode 100644
index 0000000..5da466e
--- /dev/null
+++ b/src/data/trainNumberRules.json
@@ -0,0 +1,65 @@
+{
+    "regionNumbers": {
+      "Warszawa (1)": 1,
+      "Lublin (2)": 2,
+      "Kraków (3)": 3,
+      "Sosnowiec (4)": 4,
+      "Gdańsk (5)": 5,
+      "Wrocław (6)": 6,
+      "Poznań (7)": 7,
+      "Szczecin (8)": 8,
+      "Rezerwa (9)": 9
+    },
+    "sameRegions": {
+      "Losowy": [
+        10, 11, 19, 91, 93, 97, 99, 20, 22, 29, 30, 33, 39, 40, 44, 49, 94, 50, 55, 59, 90, 95, 96,
+        66, 60, 69, 77, 70, 79, 88, 80, 89, 92, 98
+      ],
+      "Warszawa (1)": [10, 11, 19, 91, 93, 97, 99],
+      "Lublin (2)": [20, 22, 29],
+      "Kraków (3)": [30, 33, 39],
+      "Sosnowiec (4)": [40, 44, 49, 94],
+      "Gdańsk (5)": [50, 55, 59, 90, 95, 96],
+      "Wrocław (6)": [66, 60, 69],
+      "Poznań (7)": [77, 70, 79],
+      "Szczecin (8)": [88, 80],
+      "Rezerwa (9)": [89, 92, 98]
+    },
+    "categoriesRules": {
+      "EI": [null, "00", "99"],
+      "EC": [null, "000", "049"],
+      "EN": [null, "000", "049"],
+  
+      "RO": [null, "200", "999"],
+      "RP": [null, "050", "169"],
+      "RM": [null, "200", "999"],
+      "RA": [null, "200", "999"],
+  
+      "MO": [null, "200", "999"],
+      "MP": [null, "050", "169"],
+      "MM": [null, "001", "049"],
+      "MH": [null, "170", "199"],
+  
+      "PW": ["6", "000", "899"],
+      "PX": ["6", "000", "899"],
+  
+      "TM": ["4", "000", "899"],
+      "TN": ["3", "000", "899"],
+      "TK": ["3", "000", "899"],
+      "TD": ["2", "000", "899"],
+      "TG": ["1", "000", "899"],
+      "TR": ["1", "000", "899"],
+      "TC": ["0", "000", "899"],
+      "TS": ["5", "000", "899"],
+      "TH": ["5", "000", "899"],
+  
+      "LT": ["5", "000", "899"],
+      "LP": ["6", "000", "899"],
+      "LS": ["9", "000", "899"],
+      "LZ": ["9", "000", "899"],
+  
+      "ZN": ["9", "000", "899"],
+      "ZU": ["9", "000", "899"]
+    }
+  }
+  
\ No newline at end of file
diff --git a/src/locales/en.json b/src/locales/en.json
index 8915420..c4bcd13 100644
--- a/src/locales/en.json
+++ b/src/locales/en.json
@@ -395,9 +395,15 @@
     "driver-not-found-others": "Player {driver} is online as:",
     "driver-not-found-return": "GO BACK TO THE MAIN SITE",
     "stock-copy": "COPY THE STOCK",
-    "number-propositions": "PROPOSE NUMBERS",
+    "number-propositions": "PROPOSE NUMBER",
     "stock-clipboard-success": "Successfully copied the railway stock in a text form to your clipboard!",
-    "stock-clipboard-failure": "Oops! Something happened and the railway stock couldn't be copied to your clipboard! :/"
+    "stock-clipboard-failure": "Oops! Something happened and the railway stock couldn't be copied to your clipboard! :/",
+  
+    "number-propositions-header": "Generate number examples for selected category:",
+    "number-propositions-third-number": "Third digit:",
+    "number-propositions-last-nums": "{count} last digits from the range of:",
+    "number-propositions-title": "Propositions:",
+    "number-propositions-empty": "No propositions available for the chosen category! :/"
   },
   "train-stats": {
     "stats-button": "STATISTICS",
diff --git a/src/locales/pl.json b/src/locales/pl.json
index 13034c0..3cc127a 100644
--- a/src/locales/pl.json
+++ b/src/locales/pl.json
@@ -382,9 +382,16 @@
     "driver-not-found-others": "Gracz {driver} jest online jako:",
     "driver-not-found-return": "WRÓĆ NA STRONĘ GŁÓWNĄ",
     "stock-copy": "SKOPIUJ SKŁAD",
-    "number-propositions": "ZAPROPONUJ NUMERY",
+    "number-propositions": "ZAPROPONUJ NUMER",
     "stock-clipboard-success": "Pomyślnie skopiowano skład w postaci tekstowej do schowka!",
-    "stock-clipboard-failure": "Ups! Nie udało się skopiować składu do schowka! :/"
+    "stock-clipboard-failure": "Ups! Nie udało się skopiować składu do schowka! :/",
+
+    "number-propositions-header": "Wygeneruj propozycje numerów dla kategorii pociągu:",
+    "number-propositions-third-number": "Trzecia cyfra:",
+    "number-propositions-last-nums": "{count} ostatnie cyfry z przedziału:",
+    "number-propositions-title": "Propozycje:",
+    "number-propositions-empty": "Brak propozycji dla wybranej kategorii! :/"
+
   },
   "train-stats": {
     "stats-button": "STATYSTYKI",